In the base rock of the Gezhouba Dam between sandstones
and siltstones there are A number of weak intercalations consisting of claystones
silty-claystones
and their argillitgation intercalation with different thickness and behavior. Base on the results of the Quantitatire analyses of the mineral compositions and some data of grani size analysis on some representative interactions
the relation between the composition of weak intercalation
especially hydrophilic clay mineral composition
and the formation of argilligation intercalations is described and researched.